Construction of tanks.



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Patented Sept. 16,1902.

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l No. 709,303.

E. D. CHESTER.

GONSTBUCTIUN 0F TANKS.

(Application sled-Nov. 19, 1901.

` (No Model.)

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ATENT OFFICE.

EDWARD DESCO'U CHESTER, OF LONDON, ENGLAND, ASSIGNOR TO'EDWARD CHESTER du COMPANY, LIMITED, OF LONDON, ENGLAND.

CONSTRUCTION OF TANKS.

SPECIFICATION forming part of Letters Patent No. 709,303, dated September 16, 1902.

Application tiled November 19, 1901. Serial No. 82,850. (No model.)

To all whom, it 1v1/@ty concern:

Be it known that I, EDWARD Dnscou CHES- TER, a subject of the King of Great Britain, residing at 120 Bishopsgate street Within,

London, England, have invented new and useful Improvements in the Construction of Tanks, of which the following is a specification.

This invention relates to the construction p to of tanks, particularly such as are intended for use in the cyanid or other solvent treatment of ores; and the invention has more particularly for object to provide a tank which may be more easily and expeditiously erected than t 5 other similar tanksheretofore used. Heretofore the joints of sheet-iron tanks have been made by riveting the plates together, an operation which, owing to the large dimensions of the tanks, must necessarily be zo performed in situ; and the principal object of my improved construction is to entirely obviate the operation of riveting, which is an eX- pensive and `lengthy one in the localities where such tanks are to be erected and used. Reference is to behad to the accompanying H drawings, forming part of this specification,

wherein- Figure l is a part plan,'and Fig. 2 a part outside elevation, of` the improved tank. 3o Figs. 3 and l are vertical sections of the tank, showing, respectively, one of the standards and one of the holding-down bolts. Fig. 5 shows an inside face view of a standard with adjacent parts. Fig. 6 is a horizontal section of a standard and adjacent parts. Figs. 3` to 6 are drawn to a larger scale; According to my invention the side wallof` thetank (which ispreferably circularinplan) is built of curved plates l, forming segments 4o of the circumference of the tank, in combination with standards 2, whereby thejoints between adjacentl plates are made. Each plate 1 extends. throughout the depth of the tank and is without flanges or other projections, so that the" plates may be nested together for transport. a pair of longitudinal grooves 3 formed in its opposite sides to receive the end edges ,am of an adjacent pair of the plates l, these "5`grooves being preferably slightly dared, as -`\shown in\Fig. 6, so as to facilitate insertion Each standard 2 has of the end'edges of the plates. A tight joint is made between the plates and the standards by means of packing inserted between the edges ofthe plates and the bottom of the grooves 3. Each standard has formed in it towardthe lower end agap', opening inward to receive the margin of the tank-bottom, and a pair of wedges Il are inserted through an opening near the upper end of 6o each standard, so as to bear downward upon the upper corners of adjacent plates l in order to enable the lower edges of the plates to be adj usted in alinement vwith one another and with the intervening upper jaw of the gap 5. By means of this adjustment the continuity of the joint (made as hereinafter described) Vbetween the wall and bottom of the tank is insured. (See Fig. A

The structure is bound circumferentially 7o by tie-rods 6, of which there may be several series in the height of the tank, as indicated, each rod extending from one standard to the next, and the ends of the tie-rods, which pass through holes in the standards,being threaded to receive nuts 7, which bear against the standards. The nuts on the'adjacent ends of two circnmferentially-consecutive tie-rods are at opposite sides of the same standard, so that any two consecutive lengths of tierod 8o are connected through the medium of that standard through which both pass, and an ef- -fect is obtained (in the case of each complete series of consecutive tie-rods extending circumferentially around the tank) equivalent to that of a continuous encircling band or hoop, with the further advantage that the joints between each pair of adjacent standards and the intermediate si'deplates can be independently tightened. It willbe apparent 9o that by screwing up the nuts 7 of each circumferential series of tie-rods the circumference of the tank-wall will becontracted and the end edges of the plates l will be forced into the grooves 3 until the lateral joints of the 95 tank are made tight. The.` tierods 6 are placed outside of the plates l and are preferably made flat or hoop-like in cross-section and curved to lie snugly, against the outer faces of the plates, so that the tendency of the roo tie-rods to straighten under the pull caused by the tightening of the nuts 7 will counterand the under side of the boarding 8.

act the tendency of the plates to buckle 4und er the same stress.. In place of the nuts 7 the tie-rods 6 might be y provided with cotters adapted to bear against the standards 2.

v The door or bottom of the tank may be of wood planks S, .tongue-and-grooved together..

and supported byjoists 9, as usual, the diameter of the flooring being somewhat greater than that of the tank-wall, so that the margin ofthe flooring, rabbeted, as at\10,extends beyond the bottom edge of the side plates 1 and into the gap 5 in the lower end of each of the standards 2. A tight joint is made between the side and bottom of the tank by the plates 1 and standards 2 being drawn down tightly upon the bottom, for which purpose pairs of wedges 11 are driven between the lower jaw 12 of the gap 5 in each standard `and the under side of the boarding 8 of the floor. A flat ring 13, ofwrought-iron or other metal, constructed of overlapping segments and extending throughout the circuit of the tank-bottom, (to which it is made fast withr screws,) is interposed between the wedges 11 This ring 13 binds together the planks 8 and by its stiffness serves also to insure a sound and continuous joint between the plates 1 and the Hooring by distributing throughout the length of joint intervening between the standards 2 the pressure due to the action of the wedges 11, (and of the intermediate holding-down bolts hereinafter described, if such be used.) The pairs of wedges 11 are received lin guide-grooves in the lowerjaws 12, and the gaps 5 extend outward sufficiently to prevent the back of the gaps from coming in contact with the edge of the flooring 8 and ringl when (in consequence of the tie-rods G being tightened) the diameter of the wall of the tankis contracted. The groove between the shoulder 10 of the rabbet and the inner face of the plates l is suitably calked, and a tight joint between the lower edge of the plates and the flooring may be further insured by means of suitable packing inserted between them. It will be obvious that (except at the standards 2) the planks 8, forming the tank-bottom, may for the sake of convenience extend an indefinite distance beyond the wall'of the tank. The standards 2 when drawn down by the action of the wedges 1l bear upon the upper corners of the plates 1 through the medium of the wedges 4 at their upper ends, thus making tight the joint between the side and bottom of the tank. The side plates may be of such length circumferentially of the tank as to permit of the standards being set suiciently close together to obviate the use of further devices for maintaining a tight joint throughout the length of each side plate; but where, as in the example illustrated in Figs. l and 2, the length of the side plates renders such further devices necessary holding-down bolts 18, spaced at suitable intervals, are provided between the standards, these bolts having hooked upper ends 14, engaging the upper edge of the side plates 1, while the lower threadedends of the bolts passthrough holes in the flooring 8 and in the ring 13 beneath and receive nuts 15,Which when tightened up against said ring draw `the lower edge of the plates 1 tightly down` upon 4the boarding vbothvertical and horizontal abutment-sur- -faces for making joint with the sideplates and standards, circumferentially-extending tie-rodsconnecting each two adjacent standards and adapted to draw the plates and standards together, and means for drawing both the standards and the plates down upon the horizontal abutment-surface of the rabbeted margin of the tank-bottom, substantially as described. l

2. A circular tank constructed of curved side plates, intermediate standards grooved to receive and make joint with the ends of the plates, circumferentially-extending tierods connecting each two adjacent standards,

a floor or bottom extending beneaththe lower edge of said plates, jaws formed on the lower ends of the standards and embracing the edge of the floor, Aand wedges interposed between the tank-bottom and the lower jaws of the standards for drawing the standards tightly down upon the tank-bottom.

3. A circular` tank constructed of` curved side plates, intermediate standards grooved to receive and make joint with -the ends of the plates, circumferentially-extending tierods connecting each two adjacent standards,

a floor or bottom extending beneath the lower l edge of said plates, jaws formed on the lower ends of the standards and embracing the` edge of the floor, a metal ring extending` ends of the standards and embracing the edge of the floor, Wedges interposed between the tank-bottom and the lower jaws of the standards for drawing the standards tightly down upon the tank-bottom, slotsin the upper ends ot the standards in alinement with the grooves thereof, and wedges driven into the slots and bearing upon the upper edges of the plates for the purpose of pressing the lower edges of the plates down upon the tankbottom.

5. A circular tank constructed of curved side plates, intermediate standards grooved to receive and make joint with the ends of the plates, circumferentially-extending tierods connecting each two adjacent standards, a fioor or bottom extending beneath the lower edge of said plates, jaws formed on the lower ends of the standards i and embracing the edge of the floor, wedges interposed between the tank-bottom and the lower jaws of the standards, and hook tie-bolts engaging with the upper edge of the side plates intermediate of the standards, the bolts being provided with tightening means, said means abutting against the under side of the tankbottoin so as to draw the lower edges of the plates down uponv the tank-bottom.

6. A circular tank constructed of curved side plates, intermediate standards grooved to receive and make joint with the ends of the plates, circumferentially-extending tierods connecting each two adjacent standards, a floor or bottom extending beneath the lower edge of said plates, jaws formed on thelower ends of the standards and `embracing the edge of the iioor, wedges interposed between the tank-bottom and the lower jaws ot the standards for drawing the standards tightly down upon the tank-bottom, slots in the upper ends of the standards in alinement with the grooves thereof, wedges driven into the slots and bearing upon the upper edges of the plates, and hook tie-bolts engaging with the upper edge of the side plates intermediate of the standards, the bolts being provided with tightening means, said means abutting against the under side of the tank-bottom so as to coact with the standards and their wedges in forcing the lower edges of the plates down upon the bottom of the tank.

7. A circular tank constructed of sides formed of curved plates with intermediate standards grooved to receive and make joint with thetends of the plates and provided with jaws extending beneath the tank-bottom, tierods connecting the standards circumferentially of the tank for drawing adjacent standards toward one another, a Hoor or bottom extending beneath the lower edge of the plates, Wedges interposed between the standards and upper edge of the plates, wedges interposed between the jaws of the standards and the bottom of the tank for forcing the plates and bottom together, and hook-bolts intermediate of the standards, said bolts engaging with the upper edge of the plates and extending through the bottom of the tank and having nuts for drawing the plates and bottom of the tank together, substantially as speoied.

S. In a circular tank constructed with curved side plates and intermediate standards grooved to receive and make joint with the ends of the plates, the combination with the plates and standards, ot` a circumferential series of ties in non-alined sections, the series forming with the standards to which they are connected a completely-closed circle, each tierod connecting two adjacent standards by the ends of the said tie-rod passing through holes in the standards and having tightening means bearing against the standards, the tightening means of consecutive rods bearing against opposite sides of the same standards so as to enable the joints between each pair ot' adjacent standards and the intermediate side plate to be independently tightened Without disturbing the remainder.

9. A tank constructed of plates, standards intermediate ot' the plates, and a bottom or tloor extending beneath the lower edge of the plates, the standards being adapted at one end to engage the upper edge ot the tank and being provided at the other end with jaws which extend beneath the bottom or tloor so asin conjunction with wedges or their equivalent to constitute cramps whereby to force the plates and standards against the bottom and so make a tight joint, substantially as specified.

EDWARD DESCOU CHESTER. Witnesses:

WM. CLARK, FREDERICK TYLER. 

